package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishSerViceimpl implements DishService {

    @Autowired
    DishMapper dishMapper;
    @Autowired
    DishFlavorMapper dishFlavorMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;

    @Autowired
    SetmealMapper setmealMapper;

    /**
     * 新增菜品和口味
     *
     * @param dishDTO
     */
    //开启事务管理
    @Transactional
    public void addDishAndFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //添加一个菜品
        dishMapper.addDish(dish);

        Long id = dish.getId();

        //添加n条口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            //插入
            dishFlavorMapper.addFlavor(flavors);
        }
    }

    /**
     * 分页查询菜品
     *
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult selsetPageDish(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.selsetPageDish(dishPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除菜品
     *
     * @param ids
     */
    @Transactional//开启事务管理
    public void deleteDish(List<Long> ids) {
        //判断当前菜品是否能删(起售?)
        for (Long id : ids) {
            Dish dish = dishMapper.getDishId(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //(是否被套餐关联)
        List<Long> los = setmealDishMapper.getSetmealIdByDishId(ids);
        if (los != null && los.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        /*for (Long id : ids) {
            //删除菜品
            dishMapper.deleteDish(id);
            //删除对应口味
            dishFlavorMapper.deleteDishFlavor(id);
        }*/

        //批量删除菜品数据
        dishMapper.deleteDish(ids);

        //批量删除对应口味
        dishFlavorMapper.deleteDishFlavor(ids);
    }

    /**
     * 根据id查询菜品和菜品对应口味数据
     *
     * @param id
     * @return
     */
    public DishVO getByidAndeFlavor(Long id) {
        //查询菜品表
        Dish dish = dishMapper.getDishId(id);
        //查询口味表
        List<DishFlavor> list = dishFlavorMapper.getByDishId(id);
        //封装
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(list);
        return dishVO;
    }

    /**
     * 根据id修改菜品和口味信息
     *
     * @param dishDTO
     */
    public void updateAndFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //修改菜品表
        dishMapper.update(dish);
        //修改口味表(先删除原有口味数据,在插入新的数据)
        dishFlavorMapper.deleteDishFlavor1(dishDTO.getId());
        //插入新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //插入
            dishFlavorMapper.addFlavor(flavors);
    }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 菜品起售停售
     *
     * @param status
     * @param id 菜品id
     */
    @Transactional
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);

        if (status == StatusConstant.DISABLE) {
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
//            List<Long> dishIds = new ArrayList<>();
//            dishIds.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(id);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }
}
